Plasma Generators

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Patrick Snow
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1 Plasma Generators

2 Lamp Power Supplies Plasma Generators DC Power Supplies Optical Interface Others Plasma Generators Introduction Applications Plasma is generated from a gas by introducing energy, usually applied by an electric field with alternating voltage in the range from some khz to several MHz. The voltage required to initiate the plasma process becomes lower when gas pressure is reduced. However this requires a sealed reactor and a vacuum pump. The plasma generators we offer are designed for use at normal atmospheric pressure. This is the most economic way to go for in-line production applications as well as for any kind of research and development. Generators Our plasma generators are targeted for research and development, process engineering, and science. They are also a good choice for low-power production applications as well as in-line quality control. The generators are built with all-air insulation. Thus there are no parts that have to be serviced. The user may freely program all variables of the generator independently. This makes our generators the ideal choice for development purposes. However with automation interfaces for PLC as well as a CAN field bus interface integration into a production line becomes seamlessly easy. Customer Specific All models shown are examples of our standard range. We are happy to tailor any product to your special requirements or do a complete new design from scratch, conforming to your specifications. Disclaimer All data, pictures and descriptions presented in this catalog is given at our best knowledge and thought to be reliable. However these may change at any time due to our commitment to continuous improvement. Thus we assume no responsibility that the data is up-to-date, correct or that a product is suitable for a certain use. If you need an approval for specified data or for the suitability of a product for your application please request a written confirmation before placing an order. B-2 Plasma Generators

Datasheet Medium Frequency Generator for Plasma Generation at Normal Pressure DC Power Supplies Plasma Generators Lamp Power Supplies Shortform Data property value unit output voltage 20 kv pp output

3 Datasheet Medium Frequency Generator for Plasma Generation at Normal Pressure DC Power Supplies Plasma Generators Lamp Power Supplies Shortform Data property value unit output voltage 20 kv pp output power 500 W frequency khz mains voltage 230 V ac dimensions 19 4HE Applications barrier discharge corona discharge liquid-free cleansing surface conditioning treatment of textiles food sterilisation gas detoxication spectroscopy Benefits plasma generation at normal air pressure variable output voltage from 0 to 100% wide frequency range pulse packet modulation short circuit and no-load proof air-insulated transformer fully programmable Optical Interface Others B-3

4 Lamp Power Supplies Plasma Generators DC Power Supplies Optical Interface Others Your Task There are nearly unlimited applications for low temperature plasma at normal atmospheric pressure. Plasma sterilisates. It kills germs and spores in food products, paints and textiles. Plasma ablates material. It cleans, degreases, improves and conditions surfaces prior to painting, glueing or electroplating. Plasma enforces chemical reactions. It passivates or oxidates surfaces of metals to protect against corrosion or or to ease consecutive treatments. Its reactivity is usable for purifying exhaust gases of motors or incinerators. Toxic molecules are transformed into less dangerous ones. Plasma makes gases emit its characteristic spectrum. With a spectrometer you can analyze the contents of a gas fillings inside transparent materials, such as glass tubes and bulbs. Our Solution The high voltage generates a plasma at a dielectrically insulated electrode (barrier), even at normal atmospheric pressure. This effect is known as barrier or corona discharge. At normal pressure no vacuum is needed to initiate plasma generation, and thus no sealed reactor. This eases integration in a production flow. No liquid is needed. You neither have to supply nor to dispose or decontanimate any liquid. And there is no need for filters or catalytic converters that have to be replaced periodically. Because of the completely variable setting of output voltage and frequency you can optimize the plasma formation for your application. B-4

Function From an intermediate DC circuit the G2000 generates square unipolar pulses with programmable frequency, width and amplitude.

Applying high voltage pulses results in a (quasi-) sinusoidal voltage across your load.

This allows a burst mode operation to stabilize the plasma formation. You can set all variables freely and indepently via menus on a large 4-line LC display with only a few keystrokes and a datawheel.

5 Function From an intermediate DC circuit the G2000 generates square unipolar pulses with programmable frequency, width and amplitude. These pulses are transformed to high voltage and coupled to the electrode. The system of transformer inductance plus the capacitance of the cable and your load builds a resonant circuit. Applying high voltage pulses results in a (quasi-) sinusoidal voltage across your load. output voltage below resonance output voltage near resonance The output pulse train can be periodically blanked by means of pulse packet modulation. This allows a burst mode operation to stabilize the plasma formation. You can set all variables freely and indepently via menus on a large 4-line LC display with only a few keystrokes and a datawheel. The G2000 is short-circuit and open-circuit proof. Several independent current limiters control the mains current, the average current and the peak current. On the mains side an active power factor correction (PFC) and a mains filter reduces harmonics and smoothes the operating current. Optical DC Power Supplies Plasma Generators Lamp Power Supplies Interfaces Interface front panel menu All variables are normally set via the front panel menu. rear panel For production environments there is a set of digital control and monitor lines to control the G2000 remotely. For complete remote control the G2000 has a CAN interface to set the variables and to control its operation. Others B-5

6 Lamp Power Supplies Plasma Generators DC Power Supplies Optical Interface Others Usage The generator is designed to be mounted inside a cabinet. It must not be operated outside such a cabinet. The protection class is IP40 for the front and IP20 for the rear. Options The G2000 has an optional RS-485 interface for programming and control. To adopt to a wide range of loads the airgap, and thus the inductance, or the secondary winding of the high voltage transfomer might be modified. The winding is easily accessible, and so is the air gap. B-6

Variants The generator is available with internal transformer or with external transformer. Internal Transformer The G2000 with internal transformer connects to a coaxial high voltage cable.

Both units are interconnected by a pair of control wires, which are included in the delivery. We will also supply the G2000 also without transfomer in case you want to use your own one.

7 Variants The generator is available with internal transformer or with external transformer. Internal Transformer The G2000 with internal transformer connects to a coaxial high voltage cable. The cable and also the jack for the other end are available as accessories. External Transformer external transformer The G2000 with external transfomer comes with a separate transformer box. Both units are interconnected by a pair of control wires, which are included in the delivery. We will also supply the G2000 also without transfomer in case you want to use your own one. Comparison Using an internal transformer means that you have everything contained in one box. On the other hand the usable frequency of the generator is practically limited due to the capacitance of the cable. Using an external transformer means placement of the transfomer near to the load with short wires. This allows operation at higher frequencies. Optical DC Power Supplies Plasma Generators Lamp Power Supplies Accessories Interface high voltage cable coaxial jack The high voltage cable is a critical part, considering the high voltage and frequency applied to it. We deliver a proven cable with lugs on both ends in different lengths. To adopt your electrode the matching jack for the far end is also available. Others B-7

8 Lamp Power Supplies Plasma Generators DC Power Supplies Optical Interface Others Specifications Operating Range min typ max unit output voltage (1) 0 20k V pp output power 500 W frequency (2) khz packet pulse or pause width 1000 ms intermediate circuit voltage V dc intermediate circuit current 4 A dc secondary inductance 20kV pp transformer 10kV pp transformer secondary capacitance 100 pf secondary peak current 20kV pp transformer 10kV pp transformer (1) The output voltage depends on the frequency adjustment and the load capacity. (2) Lower frequencies are feasible, but locked by means of software. mh mh Environment min typ max unit ambient temperature 0 40 C storage temperature C relative humidty 70% mains voltage V ac mains current 4 10 A ac mains frequency Hz Dimensions min typ max unit height 132 mm width 482 mm depth (3) 420 mm (3) Allow extra space for the high voltage connector extending to the rear. A A B-8

9 number generators description Order Code generator 500W with internal transformer 20kV pp generator 500W with internal transformer 10kV pp generator 500W without transformer generator 500W with external transformer 20kV pp and cables, consists of generator transformer - set of interconnecting cables 3 meters transformers external transformer 500W 20kV pp in case external transformer 500W 10kV pp in case cables and accessories high voltage cable with coaxial jacks 1 meter high voltage cable with coaxial jacks 1.5 meter high voltage cable with coaxial jacks 2 meter coaxial jack for connecting high voltage cable (1) The high voltage cables are available with any length. DC Power Supplies Plasma Generators Lamp Power Supplies Redline Technologies Elektronik GmbH - published Others Interface Optical B-9

10 2014 Redline Technologies Elektronik GmbH, Baesweiler, Germany HVP Korea Co., Ltd #601 Hyundai Bldg, Mapo-Daero 15, Mapo-Gu, Seoul, Korea -technologies.de Tel: / hvpkorea@hvp.kr /

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